diff options
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 25 |
1 files changed, 8 insertions, 17 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index c220315dc533..c161069bfdbc 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1573,8 +1573,9 @@ static struct page *alloc_surplus_huge_page(struct hstate *h, gfp_t gfp_mask, */ if (h->surplus_huge_pages >= h->nr_overcommit_huge_pages) { SetPageHugeTemporary(page); + spin_unlock(&hugetlb_lock); put_page(page); - page = NULL; + return NULL; } else { h->surplus_huge_pages++; h->surplus_huge_pages_node[page_to_nid(page)]++; @@ -3776,8 +3777,7 @@ retry: * handling userfault. Reacquire after handling * fault to make calling code simpler. */ - hash = hugetlb_fault_mutex_hash(h, mm, vma, mapping, - idx, haddr); + hash = hugetlb_fault_mutex_hash(h, mapping, idx, haddr); mutex_unlock(&hugetlb_fault_mutex_table[hash]); ret = handle_userfault(&vmf, VM_UFFD_MISSING); mutex_lock(&hugetlb_fault_mutex_table[hash]); @@ -3885,21 +3885,14 @@ backout_unlocked: } #ifdef CONFIG_SMP -u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, - struct vm_area_struct *vma, - struct address_space *mapping, +u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping, pgoff_t idx, unsigned long address) { unsigned long key[2]; u32 hash; - if (vma->vm_flags & VM_SHARED) { - key[0] = (unsigned long) mapping; - key[1] = idx; - } else { - key[0] = (unsigned long) mm; - key[1] = address >> huge_page_shift(h); - } + key[0] = (unsigned long) mapping; + key[1] = idx; hash = jhash2((u32 *)&key, sizeof(key)/sizeof(u32), 0); @@ -3910,9 +3903,7 @@ u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, * For uniprocesor systems we always use a single mutex, so just * return 0 and avoid the hashing overhead. */ -u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, - struct vm_area_struct *vma, - struct address_space *mapping, +u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping, pgoff_t idx, unsigned long address) { return 0; @@ -3957,7 +3948,7 @@ vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, * get spurious allocation failures if two CPUs race to instantiate * the same page in the page cache. */ - hash = hugetlb_fault_mutex_hash(h, mm, vma, mapping, idx, haddr); + hash = hugetlb_fault_mutex_hash(h, mapping, idx, haddr); mutex_lock(&hugetlb_fault_mutex_table[hash]); entry = huge_ptep_get(ptep); |